CVE-2021-30900 kev in the critical feed json
An out-of-bounds write issue was addressed with improved bounds checking.
published 5y ago modified 4mo ago also EUVD-2021-17817
- cvss
- 7.8
- version 3.1, CNA
- cisa kev
- Exploited
- added 2023-03-30
- epss
- 5.2%
- EPSS 5.2% chance of exploitation in 30 days, percentile 92%
- public exploits
- 0
- none known
Summary
An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 14.8.1 and iPadOS 14.8.1, iOS 15.1 and iPadOS 15.1. A malicious application may be able to execute arbitrary code with kernel privileges.
Patch / fix
cisa required action Apply updates per vendor instructions.
- Apple iOS and iPadOS 14.8, 15.1
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Check with FencerTimeline
- Published
- Added to CISA KEV
- CISA patch deadline
- CISA SSVC: exploitation active
Known exploited
- Added
- 3y ago
- Patch by
- 2023-04-20 (3y ago)
- Ransomware
- Not known
- Required action
- Apply updates per vendor instructions.
- Vendor, product
- Apple, iOS, iPadOS, and macOS
- CISA name
- Apple iOS, iPadOS, and macOS Out-of-Bounds Write Vulnerability
CISA SSVC
- Exploitation
- Active, exploited in the wild
- Automatable
- no
- Technical impact
- total
- Assessed
- last yr.
Exploit prediction
5.20% chance of exploitation in the next 30 days, higher than 92% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 7.8 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
| NVD | 3.1 | 7.8 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
| CNA | 3.1 | 7.8 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 9.3 | AV:N/AC:M/Au:N/C:C/I:C/A:C |
Affected products
- Apple iOS and iPadOS
Classification
- Weakness
-
- CWE-787 Out-of-bounds Write
References
-
support.apple.com
/kb/HT212872
vendor-advisory
-
support.apple.com
/en-us/HT212867
vendor-advisory
-
support.apple.com
/en-us/HT212868
vendor-advisory
-
cisa.gov
/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-30900
government-resource, us-government-resource
Sources
- CVE List CVE-2021-30900
- NVD CVE-2021-30900
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